package io;

import java.io.*;
/*
缓冲流：是一对高级流，作用是加快读写效率
* BufferedInputStream:缓冲输入流
* BufferedOutputStream缓冲输出流
1)缓冲流内部有一个8KB的字节数组
* */
public class CopyDeni3buffered {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("123.jpg");
        BufferedInputStream bis = new BufferedInputStream(fis);
        FileOutputStream fos = new FileOutputStream("123456,jpg");
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        long start = System.currentTimeMillis();
        int d;
        while ((d=bis.read())!=-1){
            bos.write(d);
        }
        long end = System.currentTimeMillis();
        System.out.println(end-start);
        bis.close();
        bos.close();
    }
}
